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| ISSN: |
0700-9836 |
| Imprint: |
Toronto,: Ontario Safety League. |
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| ISSN: |
1208-1523 |
| LCCN: |
cn 97300475 |
| Imprint: |
North Bay: Mines Accident Prevention Association Ontario |
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| ISSN: |
0270-4447 |
| LCCN: |
80644042 |
| Imprint: |
Denver, Colo.: Engineering and Research Center, Division of Safety, Water and Power Resources Service |
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| ISSN: |
0381-4475 |
| Imprint: |
[Edmonton]: Alberta Energy and Natural Resources, Forest Service. |
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